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Finding the Fourth Proportional to 121,567.60, 182,351.40 and 42,689.80

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Solution

The fourth proportional to 121,567.60, 182,351.40 and 42,689.80 is: 64,034.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,567.60 : 182,351.40 = 42,689.80 : x
  2. Step 2: Convert to fraction form
    121,567.60/182,351.40 = 42,689.80/x
  3. Step 3: Cross multiply
    121,567.60x = 182,351.40 × 42,689.80
  4. Step 4: Simplify right side
    121,567.60x = 7,784,544,795.72
  5. Step 5: Solve for x
    x = 7,784,544,795.72/121,567.60
  6. Step 6: Final answer
    x = 64,034.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.